Trophic ecology of demersal fish community north of the South Shetland Islands, with notes on the ecological role of the krill

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概要

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• Bottom trawls at 8 stations and at depths from about 200 to 400m were carried out to the north of the South Shetland Islands. Thirty-six species of fish belonging to 9 families were caught. Notothenia gibberifrons, Chionodraco rastrospinosus, Gymnoscopelus nicholsi and 2 Rajidae made up about 80% of the number of fish caught. The dominant species was N. gibberifrons accounting for 51.9% of the total number of individuals and 44.7% of the total weight. It is shown that the krill (Euphausia superba, DANA) is an important food item in the diet of these demersal fish and that while many nototheniid species supplement their diet with benthic organisms, channichthyid species supplement their diets with other fish. The significance of these results is discussed in relation to the distribution of the krill and to the ecological role of the krill in the Antarctic food chain.

• 国立極地研究所の論文

著者

• Takahashi Masanori

  Japan Marine Fishery Resource Research Center

関連論文

• Notes on some fishes associated with the Antarctic krill. III. Antopterus pharao ZUGMAYER (Family Anotopteridae)
• Aspects of the roles of squid in food chains of the Antarctic marine ecosystems (extended abstract)
• Trophic ecology of demersal fish community north of the South Shetland Islands, with notes on the ecological role of the krill

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